A5074365345- Advanced Optical Sensing Technologies
- Quantum Information and Cryptography
- Photonic and Optical Devices
- Advanced Fluorescence Microscopy Techniques
- Atomic and Subatomic Physics Research
- Advanced Semiconductor Detectors and Materials
- Physics of Superconductivity and Magnetism
- Random lasers and scattering media
- CCD and CMOS Imaging Sensors
- Electronic and Structural Properties of Oxides
- 2D Materials and Applications
- Medical Imaging Techniques and Applications
- Mechanical and Optical Resonators
- Sparse and Compressive Sensing Techniques
- Advanced Fiber Laser Technologies
- Photoacoustic and Ultrasonic Imaging
- Accounting and Organizational Management
- Graphene research and applications
- Optical measurement and interference techniques
- Radiation Detection and Scintillator Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Photocathodes and Microchannel Plates
- Advanced X-ray and CT Imaging
- Superconducting and THz Device Technology
- Diamond and Carbon-based Materials Research
Nanjing University
2020-2025
Nanchang University
2019-2020
Beijing Film Academy
2014
Abstract Quantum-inspired imaging techniques have been proven to be effective for LiDAR with the advances of single photon detectors and computational algorithms. However, due disturbance background noise varies signal in outdoor environment, performance is still far from its ultimate limit set by quantum fluctuations coherent probe light. In this work, we propose demonstrate a detection perspective approaching standard quantum-limited performance. The numbers echo signals are recorded...
Image sensors with internal computing capabilities fuse sensing and to significantly reduce the power consumption latency of machine vision tasks. Linear photodetectors such as 2D semiconductors tunable electrical optical properties enable in-sensor for multiple functions. In-sensor at single-photon level is much more plausible but has not yet been achieved. Here, we demonstrate a photon-efficient camera based on superconducting nanowire array detector four programmable dimensions including...
Electron beam lithography uses an accelerated electron to fabricate patterning on electron-beam-sensitive resist but requires complex dry etching or lift-off processes transfer the pattern substrate film substrate. In this study, etching-free is developed directly write a of various materials in all-water processes, achieving desired semiconductor nanopatterns silicon wafer. Introduced sugars are copolymerized with metal ions-coordinated polyethylenimine under action beams. The process and...
Abstract It is a big challenge for lidar to detect soft targets over long distances in the atmosphere due low reflection of and strong atmospheric attenuation. In this paper, we propose an all-day system based on 4 pixel array superconducting nanowire single-photon detectors. This significantly improves detection efficiency aerosol other by utilizing advantages high sensitivity, dark count rate, wide dynamic range photon number resolution. The detects both hard 100 km away atmosphere....
Superconducting nanocircuits, which are usually fabricated from superconductor films, the core of superconducting electronic devices. While emerging transition-metal dichalcogenide superconductors (TMDSCs) with exotic properties show promise for exploiting new mechanisms and applications, their environmental instability leads to a substantial challenge nondestructive preparation TMDSC nanocircuits. Here, we report universal strategy fabricate nanopatterns via topotactic conversion method...
Abstract Quantum efficiency is one of the most important performance metrics for superconducting nanowire single-photon detectors (SNSPDs). Specifically, near-infrared NbN-SNSPDs with high quantum are extremely desirable in communications. However, due to energy gap NbN, it difficult achieve a saturated efficiency. In this paper, we systematically investigated primary determinants fabricating highly NbN-SNSPD by changing stoichiometric ratio during growth NbN thin films. Through electron...
Ultrathin superconducting films are the basis of superconductor devices. van der Waals (vdW) NbSe2 with noncentrosymmetry exhibits exotic superconductivity and shows promise in electronic However, growth inch-scale layer regulation remains a challenge because vdW structural material is strongly dependent on epitaxial guidance substrate. Herein, self-epitaxy strategy developed to eliminate substrate driving force film realize inch-sized thicknesses from 2.1 12.1 nm arbitrary substrates. The...
A large-area single-photon detector with a high maximum count rate (MCR) is expected by LiDAR application for large dynamic range and coupling efficiency. Superconducting nanowire detectors (SNSPDs) are very competitive quantum efficiency at near infrared wavelengths. However, it great challenge to balance the efficiency, area, MCR of SNSPDs due long superconducting architecture. In this article, we design SNSPD applications. The has four independent channels, each them composed parallel...
Phase slip is the intrinsic fluctuation of order parameter and leads to dissipation superconductors. Here we propose a photon-assisted phase-slip model in superconducting nanowires explain rate under photon irradiation. In this phenomenological model, incident photons destroy large quantities Cooper pairs reduce free-energy barrier phase slips, resulting proliferation events leading transition. The switching rates from state niobium nitride nanowire various irradiation (4.4 mW/m${}^{2}$--4.4...
Although many multiplexed arrays of a superconducting nanowire single-photon detector (SNSPD) have been reported, it is still major challenge to develop pixel-level readout with high efficiency, parallel detection, and fast processing for real-time imaging. Here, we report SNSPD array inductor-shaping pulses approaching the readout. Optimized inductors are introduced shape output each pixel, response all pixels synthesized in series-connected structure. Then, on/off states can be encoded...
The combination of single-pixel-imaging and single-photon-counting technology can achieve ultrahigh-sensitivity photon-counting imaging. However, its applications in high-resolution real-time scenarios are limited by the long sampling reconstruction time. Deep-learning-based compressive sensing provides an effective solution due to ability fast high-quality reconstruction. This paper proposes a integrated neural network for To effectively remove blocking artefact, subpixel convolutional...
Abstract Superconductor nanodevices serve significant platforms for solid-state quantum systems, such as computer and detector. And the out-of-equilibrium phenomena always plays an important role in superconductor nanodevices. Here we reported incoherent superconducting nanowire phonon detector revealing controversial gate-controlled superconductivity (GCS), which recently provide a new perspective on design of devices. The asymmetric dependence gate-inducing signal count rate (CR) gate...
Superconducting nanowire single-photon detectors (SNSPDs) play an important role in lidar and quantum information due to their excellent comprehensive performance. However, it is a major challenge read out the SNSPD arrays for high heat load cost of readout circuit cryocooler. Here, we propose single-channel imaging scheme based on compressed sensing (CS), which synergistically samples, combines, reconstructs response signals from all pixels arrays. Based row–column (RC) multiplexing array,...
<sec>Superconducting nanowire single-photon detector (SNSPD) is one of the most mainstream detectors at present, which possesses excellent comprehensive performance, including low time jitter, high efficiency, dark count, and wide spectrum. However, traditional single-pixel SNSPD suffers a lack spatial resolution small photosensitive surface, becomes bottleneck associated with optical coupling efficiency. In addition, has no ability to resolving photon number, whose working speed...
Abstract The investigation of photon response in the superconducting state interfacial superconductors holds both fundamental and practical significance, yet it remains largely unexplored. Here, we report an energy-sensitive photodetector utilizing a microstrip patterned on superconductor (LaAlO 3 /KTaO ), achieving spanning from visible to near-infrared wavelengths. Remarkably, pulse amplitude at same wavelength is linearly related incident light power, showing unique detection capability...
Superconducting nanowire single photon detector (SNSPD) plays a significant role in plenty of fields such as quantum information, deep space laser communication and lidar, while the mechanism response process still lacks recognized theory. It is prerequisite essential for fabricating high-performance SNSPD to understand depth clarify SNSPD. As mature theories on progress, hot-spot model vortex-based both have their disadvantages: former there exists cut-off wavelength later size effect, so...
The characterization and manipulation of polarization state at single photon level are great importance in research fields such as quantum information processing key distribution, where photons normally delivered using mode optical fibers. To date, the demonstrated polarimetry measurement techniques based on a superconducting nanowire detector (SNSPD) require SNSPD to be either highly sensitive or insensitive photon's state, therefore placing an unavoidable challenge SNSPD's design...
Superconducting nanowire single photon detectors (SNSPDs) have been extensively investigated due to their superior characteristics, including high system detection efficiency, low dark count rate and short recovery time. The polarization sensitivity introduced by the meandering-type superconductor nanowires is an intrinsic property of SNSPD, which normally measured sweeping hundreds points on Poincaré sphere overcome unknown birefringent problem SNSPD's delivery fiber. In this paper, we...
Along with China's strong economic development in recent years, hotel industry took the opportunity of 2008 Beijing Olympics and ushered spring, star hotels have sprouted various big-middle cities.According to Horwath management company statistics, Entire China had nearly 70 projects under construction or completed 2013.Thus,a new accounting category Direction-Hotel Accounting gradually surfaced.This article briefly state about status profession preliminary, then discuss model conditions for...
<title>Abstract</title> Quantum-inspired imaging techniques have been proven to be effective for LiDAR with the advances of single photon detectors and computational algorithms. However, quantum-limited performance is still far from its ultimate limit set by quantum fluctuations signal noise photons. In this work, we propose demonstrate detection perspective approaching performance. A photon-number-resolving detector introduced accurately reconstruct echo signals in a wide photon-flux range...
As a competitive technology, the superconducting nanowire single-photon detector (SNSPD) is developing from single-pixel to array architecture; however, it major challenge for reading detectors. We propose an encodable trigger through thermal coupling of two adjacent nanowires, which can read current pulse with microampere amplitude and code pulses different positions output resistances simultaneously. At same time, influence external noise on devices be avoided isolated circuits....